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New Muff and Rejet (Read 3 times)

thumperclone

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PGR rider riding
with respect

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Grand Junction Colorado
Gender: male

Re: New Muff and Rejet
Reply #15 - 08/03/06 at 13:30:13

ohms wrote on 12/31/69 at 16:00:07:

Thanks for the help guys, I think the exhaust might have been leaking. I did the whole cover up the end of the pipe and soapy water bit but I didnt see anything. So just to make sure I put some silicone sealer around the connection and tightened the hell out of the clamp.

This morning I drove to work and voila I wasnt getting any backfires on decel or at least nothing major, occasional put puts. Now what seems to happen is backfiring on upshift from 1st to 2nd, all other gears seem ok. Am I running too rich now?

in the morning odds are the ambient air temp is cooler than other times of the day
this changes motor operation as does humidity

standing for those who stood for US

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Brewbrother

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Gender: male

Re: New Muff and Rejet
Reply #16 - 08/03/06 at 17:44:01

ohms wrote on 12/31/69 at 16:00:08:

Well i finally fixed the bike.

I ended up pulling the intake boot off and reseating it properly so i was sure there were no leaks there. Then I pulled the header bolts out and put some locktite on them and put them back in. No leaks at the header. Bike was still backfiring at this point but not as badly. I pulled the top of the carb and shaved my 1/2 spacer prob down to about 1/4 maybe a little less. Then I adjusted the mix screw which is at about 2 1/2 turns now.

Been riding the nuts out of the bike now for 3 days and the backfiring is gone, the bike is also a lot more responsive now. I'm thinking the additional spacer shave must have helped. It still backfires but very rarely and it doesnt sound like a gun shot.

Thanks to everyone for their assistance. Much appreciated.

Glad you got what you wanted. I'd be concerned about the locktite on the header bolts. I run no spacer and get no backfires on upshift but decel you can detect low "sputs" but I think they are just part of the thumper mechanical mystic.

Opportunities multiply as they are seized.
No spacer,60 pilot jet, 155 main jet, plug door, sportster muffler, k&n drop in, iridium plug, brake pedal mod,de-badged, Dunlops, bullet turn signals.

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klx650sm2002 Serious Thumper Offline The more I learn the less I know. Posts: 2041 Cumbria,England Gender:	Re: New Muff and Rejet Reply #17 - 08/04/06 at 02:08:40 S/S allen bolts for header/head interface. They don't rot like plain steel. Clive W
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thumperclone Serious Thumper Alliance Member Offline PGR rider riding with respect Posts: 7280 Grand Junction Colorado Gender:	Re: New Muff and Rejet Reply #18 - 08/04/06 at 08:02:04 there is a "milder" type of lok tite. I forget which is which red or blue or permatex? id think a ss lok washer would be better if stud length allows..jmo
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vroom1776 Serious Thumper Offline Posts: 2110 Gender:	Re: New Muff and Rejet Reply #19 - 08/04/06 at 08:59:06 blue is the milder loctite. Red can be bad news.
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